Piano.



G. G. HASBROUCK.

PIANO.

APPLIGATIONHLBD FEB. 14, 190s.

905,527. Patented Deo. 1, 1908.

i nulli/111mm GEORGE G. HASBROUCK, OF NYACK, NEW YORK.

PIANO.

Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed February 14, 1908. Serial No. 415,977.

To all whom it may concern.-

Be it known that I, GEORGE G. HAsBRoUoK, a citizen of the United States,and a resident of Nyack, in the county of Rockland and State of NewYork, have invented certain new and useful Improvements in Pianos, ofwhich the following is a specification.

This invention relates to piano construction, and it consists of a novelmanner of holding together the frame plate, pin block, posts and backmembers of a piano by means of series of nut and double bolt fasteningdevices, and the object of the invention being to provide a moreeffective and readily adjustable means of binding these parts of a pianotogether, than is the common bolted method of uniting these parts as ispracticed and in general use in present methods of pianofortemanufacture.

The invention can be more fully understood from the followingspecification taken in connection with the accompanying drawings whichform a part thereof, and as will be more particularly pointed out in theclaim.

In the drawings, in which similar parts are designated by similarletters F igure l, is a top view of a piano with the top cover removed,and showing a series of fasteners in position and holding the describedparts of a piano case securely together. Fig. 2, is a verticallongitudinal section through the frame plate, pin block and back membersof the piano, onthe line of one of the fasteners, -the nut and washersof which are also shown in section.

In the drawings A, A, represent the end members of a piano case of theupright class; B, the frame plate; O, the pin block; D, D, D, D, D, D,the posts; and E, the back member; respectively; all of which are shownas held rigidly together by the fasteners, F. F, F2, F3, Ft, as seen inFig. l. The lower parts of the frame plate, pin block, posts, and backmember, respectively; can be also held together in a similar manner, byfasteners of similar construction, as can be understood. These fastenersare each composed of a middle sleeve nut G, of cylindrical shapethreaded at one end G', with a left hand thread G2, and the other endG3, with a right hand thread G, and to which nut the bolts H, H, arecorrespondingly fitted. The nut G, has holes through the side one ofwhich, G5, is seen in Fig. 2, for

the purpose of receiving the end of a lever or wrench, that the nut maybe turned around upon the bolts H, H, whenever the heads of the lattercannot be turned. This construction provides for binding the frame B,and block C, by means of the bolt H, and nut G, as seen in Fig. 2, whileleaving the back E, and bolt H', detachable or detached from the frameplate B, and which in the case of a common bolt fastening could not bedone, under like conditions.

L, L, represents washers under the heads H2, H3, of the bolts H, H', togive proper bearing surface for the bolt heads against the frame andback parts of the instrument. The nut G, can have a liange or washeralso provided between it and the adjacentsurface of the block asindicated by the dotted lines M, in Fig. 2, if so desired. The piano canbe otherwise made like any common instrument, and in which I, I, are thepins to which the strings J, J, are connected, and can be played upon bythe keys K, K, through intermediate keyboard mechanism such as is foundin any piano but which is omitted from the drawings as not beingessential in the illustration or description of this invention, andwhich can be understood.

From the foregoing description, the purposes and advantages of theinvention can be understood. By its use, a simple and effective means ofassembling and holding the parts of the frame of a piano as described,securely together is provided, which can be adjusted either by the boltheads or by the nut as may be found most convenient. It can thus beseen, that I provide a simple and complete device for the purposeintended, and that it meets all the requirements of such a constructionof a pianoforte.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

In a piano, the combination of a frame plate, a pin block, a backmember, and a post between the back and pin block, and a fasteningcomprising the threaded nut G, and bolts H, H', substantially asdescribed.

Signed at New York city, in the county of New York, and State of NewYork, this 11th day of February, A. D. 1908.

GEORGE G. HASBBOUOK.

Vitnesses C. G. MosTACEULo, Geo. MCOLELLAND.

